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When I say a seed is “wrinkled,” what have I described?

Tail length in a certain species of armadillo falls along a continuum; a plot of tail length versus frequency displays a normal distribution. Assuming that environmental factors do NOT play an important role in determining tail length, this type of variation probably reflects __________.

Which of the following molecules is released by platelets in the vicinity of an injury?

Fill in the blank with the correct form of TENER. Mi hermana mayor _______ treinta años.

Fill in the blank with a logical response based on the sentence.  La madre de mi esposo es mi ______. 

Read the phrase, replace the English phrase in parenthesis with a logical Spanish phrase.   Use lowercase letters only, be sure to use the correct form of the verb and use a space between words.  Do not put a period at the end of the phrase. Yo (am scared).

Select the most logical response to the following question.  ¿Es Ud. español?

Fill in the blank with the correct form of the verb SER.  Yo ______ de España. 

Read the sentence and decide whether you should use SER or ESTAR and write the correct form. Hoy, Cati _____ muy bonita (looks it now).

Oxides of most nonmetals combine with water to form _______.